package cn.softeem.tushu.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


public class LoginFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        Object sessionUser = request.getSession().getAttribute("user");
        //登录还没有来先注释掉,不然做不了
        if (sessionUser == null) {
            req.setAttribute("code", "error");
            req.setAttribute("msg", "您还没有登录！");
            req.getRequestDispatcher("/jsps/msg.jsp")
                    .forward(request, response);
        } else {

            chain.doFilter(request, response);
       }
    }

    public void init(FilterConfig config) throws ServletException {

    }

}
